To quickly confirm an asymptomatic case of COVID-19, a second rapid test within an hour of a positive result can boost the accuracy of the result from 38 percent to 92 percent, according to a new ...

A prospective cohort study has found that repeat testing in 48-hour intervals with a rapid antigen test (Ag-RDT) may be required to rule out SARS-CoV-2 infection. This means that people testing for ...

This decision, well within current norms for care, was nonetheless consequential: The president was forced to cancel a trip to advocate for legislation in support of the domestic semiconductor ...

Dr. Matt Binnicker, an expert in the diagnosis of infectious diseases, reviews scenarios where an at-home antigen test is a good option, and when to seek out a lab-based PCR. The omicron variant is ...

You’ve been exposed to COVID and are starting to get symptoms. But after a couple of days of testing with rapid antigen tests (RATs), your tests remain negative. Mass PCR testing has been scaled back, ...